Implement a function mean(array) that returns the mean (also known as the average) of the values in array, an array of numbers.

Arguments

1. array (Array): The array of numbers.

Returns

(Number): Returns the mean of the values in array.

Examples

mean([4, 2, 8, 6]); // => 5
mean([1, 2, 3, 4]); // => 2.5
mean([1, 2, 2]); // => 1.6666666666666667

The function should return NaN if array is empty.

mean([]); // => NaN

Resources

• Lodash _.mean